One Direction’s Louis Tomlinson has become a dad for the first time after former flame Briana Jungwirth gave birth to a boy, and he has gushed at how amazing his son is.

The 24-year-old singer was present at the birth at an LA hospital on Friday, and tweeted the news today in a series of tweets.

"I'm pleased to say my baby son was born yesterday :) He is healthy and pretty amazing :) I'm very happy!!" he wrote.

The new dad later added smiling face emojis, as well as another which shared the lyrics to Boney M.’s 1976 popular hit 'Daddy Cool' that read: "Daddy daddy cool".

The newborn’s name or pictures of the little tot have yet to be shared.

But messages of congratulations have started to flood in for Louis and Briana.

The singer's band-mate Harry Styles wrote on Twitter today: "Flowers all round."

Louis is currently dating American actress Danielle Campbell but has remained friends with Briana, 23, and has been helping the stylist financially.

A source said Louis, who is a big brother to seven siblings, will make a “great dad” despite the “surprise” pregnancy after their brief fling in May last year when 3am revealed the pair were an item.

A message believed to have been posted by Briana’s grandmother, Marianna Case, told Louis he had been given a special “gift”. It read: “Louis just let your heart dance. You now have another you. A gift that will want to be just like you. Be free and just live.”

Briana’s close pal Ashley Jessica said: “Today was the best day of my life.”

And Simon Cowell – who has previously offered the 1D star parental advice –has thrown his name into the mix to be the little nipper’s godfather. Speaking at yesterday’s Britain’s Got Talent launch, he told us: “I’m godfather to a lot of kids now. I would if he asked. We’ll have to wait and see.”

Although it sounds like he won’t be much help right now, as Cowell – a father to Eric, two, admits: “I’ve never done a nappy,”

But Simon has passed on some skills to his offspring. He admitted: “I taught him how to share and say please and thank you.

“Not watch certain shows. I’ve taught him to go back to the old Disney movies.

Louis Tomlinson and Briana Jungwirth will raise their baby together but are not in a romantic relationship (Image: Xposure)

“He’s cute and happy.”

Louis dated his previous girlfriend, Eleanor Calder, for four years before splitting in March.